That could change. The Livermore Valley Joint Unified School District announced on social media that may close some schools on Thursday if the air quality gets worse. They will make an announcement by 7:30 a.m. on Thursday.

"We've been playing outside, but now we can't because of the smoke. It's bad for your lungs," says Trey.

Wednesday's calm winds means the smoke from the Camp Fire settled into the valley, which lead to the increasing air pollution. At 4 p.m. Wednesday, the air quality index read 272. At 300, air quality reaches hazardous levels.

"I look out the patio door onto Portola Drive, which is major street over here (in Livermore), and it looks foggy. I know it's not fog, it's smoke. It's just terrible," says Randy Morgan, also a Livermore resident.

As air quality reached its worst levels of the week, air masks were given out in Dublin.

If air quality worsens overnight, it could have a big impact on commuters through the Altamont Pass.